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Rok 2025
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Innovative 3D Measuring Technique for Identifying Geometrical Imperfections and Wear in Small Marine Stern Tube Liners
PublikacjaIncreasingly stringent requirements for the durability and reliability of ship components and new standards for environmental protection have resulted in the use of increasingly sophisticated technologies in the shipbuilding industry. The components of a ship’s propulsion system have been meticulously analysed and improved over several decades. The durability and reliability of the sliding bearings for a ship’s propeller shaft...
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Investigation of the thrust generated by active isolated hydrofoils via wave-induced ship motion
PublikacjaWave Augmented Hydrofoil Technology (WAHT) aims to convert hydrofoil movement, induced by ship motion, into thrust force, and ship's resistance reduction in waves. Despite the growing interest in WAHT, a significant research gap remains in understanding the complex interactions between hydrofoil design parameters and wave-induced thrust generation. A hydrofoil attached to a ship serves dual roles; reducing the ship resistance in...
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ISO test track influence on the EU tyre label noise value
PublikacjaIn 2009, the European Union (EU) introduced a directive governing the labelling of tyres, which underwent revision in 2020. This labelling system encompasses three key parameters related to tyre performance: wet grip (safety), rolling resistance (energy consumption), and external rolling noise (environmental impact). These label values serve as crucial information for customers seeking to purchase replacement tyres for their vehicles....
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Konstrukcja separatorów dla docierarek tarczowych
PublikacjaNa etapie przygotowania technologicznego operacji docierania maszynowego powierzchni płaskich, płasko-równoległych i walcowych zewnętrznych koniecznym jest opracowanie i wykonanie indywidualnych separatorów przedmiotowych, które są jednocześnie elementami układów wykonawczych docierarek tarczowych. W artykule przedstawiono wytyczne do projektowania tego typu oprzyrządowania, podano stosowane materiały na separatory oraz przykłady...
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Kontrola wymiarowa ziaren ściernych żużla pomiedziowego
PublikacjaW artykule przedstawiono ogólną charakterystykę ścierniwa żużla pomiedziowego. Omówiono podstawowe sposoby pomiarów wielkości ziaren ściernych, sposoby ich owalizacji oraz przedstawiono wyniki badań rozmiarów ziaren nieowalizowanego żużla pomiedziowego. W przeprowadzonych badaniach wykorzystano automatyczną analizę obrazu mikroskopowego. Wyniki pomiarów mogą być przydatne przy opracowywaniu technologii obróbki strumieniowo-ściernej.
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Liquid crystal thermography supported by PIV and DII as modern and unique tools for technical and biomedical research and diagnosis – mini review
PublikacjaLiquid Crystals Thermography, Particle Image Velocimetry, Infrared Imaging Thermography and Digital Infrared Imaging have been successfully used in non-intrusive technical, industrial and biomedical studies and applications. These four tools (based on the desktop computers) have come together during the past two decades to produce a powerful advanced experimental technique as a judgment of quality of information that cannot be...
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Measurement Technique Comparison in the Entire Fracture Surface Topography Assessment for Additively Manufactured Materials
PublikacjaThis paper focuses on comparing the three microscopic measurement techniques, confocal, focus variation, and point for focus, for the evaluation of entire fracture surface topographies. The measurements were performed using a Sensofar S Neox 3D optical profilometer and the Mitutoyo QV Apex 302 vision measuring system. The test specimens required for measuring were printed through laser powder bed fusion (LPBF) technology using...
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MHD Casson flow across a stretched surface in a porous material: a numerical study
PublikacjaIn this study, we examine the nature of magnetohydrodynamic (MHD) Casson flow of fluid across a stretched surface in a porous material. It studies how the behaviour of Casson fluids is affected by a number of variables, including thermal radiation, chemical processes, Joule heating, and viscosity dissipation. The Keller box strategy, based on the finite difference method (FDM), is used to tackle the complex numerical problem. Graphical...
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Microstructure degradation and creep failure study of the dissimilar metal welded joint of heat-resistant steel and Inconel 617 alloy tested at 650 °C and applied stress range of 100–150 MPa
PublikacjaThe advanced ultra-supercritical (A-USC) power plant system is anticipated to become India's next-generation base-load power station. To adopt AUSC technology, dissimilar welded joints (DWJs) between heat-resistant steels and the nickel-based alloys, using the nickel-based fillers, will need to be implemented. However, failure of dissimilar welded joints from P92 steel base metal or the heat affected zone (HAZ) has been commonly...
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Modeling of damage interaction due to uniaxial creep and subsequent LCF pure torsional loading
PublikacjaThis paper presents experimental results of creep-rupture, preliminary creep and low-cycle torsional fatigue of 2024 aluminum alloy. It analyzes the effect of pre-deformation on fatigue life under pure, cyclic torsion loading conditions. Two different pre-deformation levels were considered in the creep process at 200 ◦C and 300 ◦C. A significant influence of creep predeformation on the cyclic properties of the tested material was...
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Multi-Symptom Diagnostic Investigation of the Working Process of a Marine Diesel Engine: Case Study Part 1 Measurement Diagnostics
PublikacjaThe manuscript discusses the issue of diagnostic informativeness of measurement signals recorded during electronic indication of marine engine cylinders. It was noted that the “ fault-syndrome” relations of the diagnostic model determined on this basis are usually ambiguous, which forces the need to search for additional symptoms that ultimately confirm the diagnosis. A method of multi-symptom recognition of disturbances in the...
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Numerical Simulation of Light to Heat Conversion by Plasmonic Nanoheaters
PublikacjaPlasmonic nanoparticles are widely recognized as photothermal conversion agents, i.e., nanotransducers or nanoheaters. Translation of these materials into practical applications requires quantitative analyses of their photothermal conversion efficiencies (η). However, the value of η obtained for different materials is dramatically influenced by the experimental setup and method of calculation. Here, we evaluate the most common...
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On the Cover: Fatigue Damage Evolution in SS316L Produced by Powder Bed Fusion in Different Orientations with Reused Powder Feedstock
PublikacjaOn the Cover: Fatigue Damage Evolution in SS316L Produced by Powder Bed Fusion in Different Orientations with Reused Powder Feedstock. Exp Mech (2025). https://doi.org/10.1007/s11340-025-01179-w
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Optimization of Hydrogen Utilization and Process Efficiency in the Direct Reduction of Iron Oxide Pellets: A Comprehensive Analysis of Processing Parameters and Pellet Composition
PublikacjaThe article deals with the H2 consumption for different processing conditions and the composition of the processed pellets during the direct reduction process. The experiments are carried out at 600–1300 °C, with gas pressures of 1–5 bar, gas flow rates of 1–5 L min−1, and basicity indices of 0 to 2.15. Pellets with different compositions of TiO2, Al2O3, CaO, and SiO2 are analyzed. The gas flow rate is crucial, with 0–10 L min−1...
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Optimizing electrochemical removal of perfluorooctanoic acid in landfill leachate using ceramic carbon foam electrodes by coupling CFD simulation and reactor design
PublikacjaPerfluorooctanoic acid (PFOA), a persistent and bioaccumulative pollutant classified as a 'forever chemical', poses a global environmental and health risk due to its widespread use and resistance to degradation. The development of effective and efficient removal technologies is crucial to mitigate its long-term impacts. In this study, we present a novel approach to address the growing concern of emerging contaminants, particularly...
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Polymer Materials for U-Shaped Optic Fiber Sensors: A Review
PublikacjaFiber optic sensors have gained popularity over the last few decades. This is due to their numerous advantages, such as good metrological parameters, biocompatibility and resistance to magnetic and electric fields and environmental pollution. However, those built from glass fiber have one main disadvantage—they are fragile, meaning they can be easily damaged, even by the presence of vibration. Due to the great progress made by...
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Pomiary termowizyjne temperatury w operacjach maszynowego docierania powierzchni płaskich
PublikacjaW artykule przedstawiono problematykę oraz wyniki badań nagrzewania się elementów układu obróbkowego docierarki jednotarczowej do płaszczyzn o standardowej kinematyce. Badano wpływ podstawowych warunków obróbki na temperaturę docieranych materiałów oraz zmiany temperatury głównych elementów obrabiarki. W badaniach wykorzystano kamerę termowizyjną. Wyniki pomiarów mogą być przydatne m.in. do określenia przerw między cyklami obróbki...
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Predicting a passenger ship's response during evasive maneuvers using Bayesian Learning
PublikacjaThe rapidly advancing automation of the maritime industry – for instance, through onboard Decision Support Systems (DSS) – can facilitate the introduction of advanced solutions supporting the process of collision avoidance at sea. Nevertheless, relevant solutions that aim to correctly predict a ship's behavior in irregular waves are only available to a limited extent by omitting the impact of wave stochastics on resulting evasive...
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Pulsed current GTAW Inconel 625/AISI 304 L steel dissimilar joint: Microstructure and mechanical properties
PublikacjaThe present study aims to investigate the microstructure and mechanical behavior of Pulsed Current Gas Tungsten Arc Welded (PCGTAW) dissimilar joints of Inconel 625 and AISI 304 L steel. The dissimilar metal welded (DMW) joint was obtained using the Ni-based ERNiCrMo-3 filler. The welded joint was subjected to a microstructural study using optical microscopy and Scanning electron microscopy (SEM) with energy dispersive X-Ray...
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Pulsed GTAW joint of P92 steel and Inconel 625: microstructure and mechanical properties
PublikacjaIn the present work, the relationship between microstructure and mechanical properties has been investigated for the dissimilar welded joint of P92 steel and Inconel 625, fabricated using the pulsed current gas tungsten arc welding (GTAW) process. Microstructural investigation revealed that the pulsed current resulted in fner equiaxed dendrites in the bulk weld metal, while columnar dendrites were observed in the weld metal near...
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Quality Evaluation of Small Features Fabricated by Fused Filament Fabrication Method
PublikacjaThe purpose of this research was to evaluate the quality of small features fabricated by the fused filament fabrication (FFF) method. The samples containing circular and square cross-sections through holes with different dimensions, lengths, and orientation angles were printed from ABS (acrylonitrile butadiene styrene) filament. The adopted optical inspection method allowed us to conduct observations of individual features and...
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Recent Research Progress in the Abrasive Machining and Finishing of Additively Manufactured Metal Parts
PublikacjaAdditive manufacturing (AM) has revolutionized the production of complex geometrical parts with metals; however, the usual layer-by-layer deposition results in poor surface quality and unpredictable surface integrity. Abrasive machining and finishing techniques play vital roles in counteracting these challenges and qualifying AM parts for practical applications. This review aims to present recent research developments concerning...
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Replica road pavements for rolling resistance measurements
PublikacjaDue to the need to strictly control the measurements, tire manufacturers strive to conduct most of the tests indoors. This allows them to perform them regardless of weather conditions, all the yearlong. Currently, a lot of research concerns the rolling resistance of tires. These include both development activities and mandatory measurements related to the granting of environmental labels. Unfortunately, standardized tests are conducted...
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Reusable Biosensor for Easy RNA Detection from Unfiltered Saliva
PublikacjaBiosensors are transforming point-of-care diagnostics by simplifying the detection process and enabling rapid, accurate testing. This study introduces a novel, reusable biosensor designed for direct viral RNA detection from unfiltered saliva, targeting SARS-CoV-2. Unlike conventional methods requiring filtration, our biosensor leverages a unique electrode design that prevents interference from saliva debris, allowing precise measurements....
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Separatory jednolite i składane docierarek tarczowych do płaszczyzn
PublikacjaOmówiono rodzaje układów wykonawczych docierarek do obróbki powierzchni płaskich i płasko-równoległych. Podano zasady projektowania separatorów przedmiotowych dla docierarek jedno- i dwutarczowych. Omówiono stosowane materiały na separatory oraz zamieszczono przykłady konstrukcji separatorów jednolitych i modułowych.
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Silver and Silver/Sodium Bisphosphonate Salts: Rare Examples of Molecular Solid Solutions and Their Biological Activity as Dual-Action Compounds
PublikacjaBisphosphonates (BPs) are an important treatment for osteoporosis and bone metastases due to their low toxicity, high thermostability, and the ability to inhibit bone resorption. Notably, BPs like alendronate, which contain a primary amine group, exhibit potent antiresorptive and antiangiogenic properties. Recent studies have focused on enhancing the BP properties by incorporating bioactive metals to increase their therapeutic...
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Study of vibrational surface topography measurement errors of LPBF Inconel 718 alloy after shot peening process
PublikacjaA study of surface topography can provide valuable information on the product. Since the material finishing relies on the measured topography, the manufacturing process can be controlled by studying the roughness. The Laser Power Bed Fusion (LPBF) materials belong to the commonly used surfaces in the industry. Measuring this type of material with a contactless method can be found in many practical implementations. The white light interference...
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The characteristics of the surface structure obtained in a low plasticity burnishing process in which the jumping wave occurred
PublikacjaJumping wave formation in front of the processing tools occurs during low plasticity burnishingmethods. It significantly disturbs the plastic deformation of surface structures process. The wavecauses also additional structures to appear on the processed surface such as additional dales, seemsand laps. Furthermore, the rise of processing burnishing force causes significant increase the depthof the surface structure dales which are...
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The effect of hydrothermal carbonization (HTC) on entrained flow steam gasification of sewage sludge. Experimental validation of various gasification models
PublikacjaProper sewage sludge management is challenging due to legal requirements, environmental concerns, and logistical complexities. Steam gasification offers a promising solution by producing high-quality syngas. While research has largely focused on fixed bed gasifiers, their scalability limitations restrict their economic viability. Entrained flow gasifiers, scalable to hundreds of megawatts as demonstrated in coal gasification, present...
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The Effect of Pretreated Titanium Surface Topography on the Properties of Electrophoretically Deposited Chitosan Coatings from Ethanol-Based Suspensions
PublikacjaThis study investigated the influence of surface preparation methods on the microstructure, chemical composition, wettability, corrosion resistance, and adhesion of chitosan coatings on titanium substrates for biomedical applications. Titanium samples were subjected to grinding with abrasive papers of gradations #800, #1200, and #2000, electrochemical anodization, and etching. Surface characterization revealed that the etched samples...
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The influence of chitosan's molecular weight, concentration, and dissolution method on the properties of electrophoretically deposited coatings on the Ti13Nb13Zr alloy surface
PublikacjaIn this study, the effects of molecular weight (high, medium, and low), concentration (0.1 and 0.5 %) and dissolution method (in a rarely used hydroxyacetic acid and utilizing a novel CO2 saturation) of chitosan on the microstructure, chemical composition, wettability, surface roughness, adhesion, corrosion resistance and antibacterial activity of chitosan coatings electrophoretically deposited (10 V, 1 min) on β titanium alloy...
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The influence of printing strategies on the fatigue crack growth behaviour of an additively manufactured Ti6Al4V Grade 23 titanium alloy
PublikacjaThe selective laser melting (SLM) process, a type of laser powder-bed fusion (LPBF) in additive manufacturing (AM), uses a high-power density laser to melt metallic powders. This study involved 3D printing Compact Tension (CT) specimens from titanium alloy Ti6Al4V, known for its rigidity, corrosion resistance, and biocompatibility, making it suitable for aerospace and medical applications. To predict fatigue life, it is essential...
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The influence of selected metal oxides and laser modification on the surfaces of titanium alloys – Bibliometric and systematic review
PublikacjaManufacturing of oxide coatings (ZnO, ZrO2 , CuO) and laser processing are methods for modifying the surface of titanium and its alloys. It is particularly useful in implantology, where these techniques allow for proper connection of the implant to human tissue. The article consists of two complementary parts: a bibliographic review and a literature survey. The results of a bibliographic analysis conducted for a set of 429 publications...
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The Laser Processing of the Stainless-Steel Surface Layer of a Heat Exchanger Membrane in Order to Enhance Its Heat Transfer Coefficient
PublikacjaResearch on temperature regulation is essential for ensuring thermal comfort and optimizing machine performance. Effective cooling systems are critical in industrial processes and everyday electronic devices in order to prevent overheating. Laser-modified heat exchangers can enhance heat dissipation without increasing weight, addressing the need for energy-efficient solutions in the market. The main aim of this experimental research...
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Theoretical background of the operating parameters of the satellite working mechanism of the hydraulic positive displacement machine
PublikacjaThis article describes a method for determining the instantaneous geometric working volume of a satellite mechanism that is commonly used as a working mechanism in positive displacement machines (pump and motor). A new mathematical formula for calculating the instantaneous geometric working volume as a function of the angle of rotation of the shaft (rotor) has been proposed. For the satellite mechanism operating as a pump, the...
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Thermal affection on hydrogen diffusion in different structures of nickel alloy
PublikacjaPurpose Based on previous research, we choose nickel alloy 718 as the research material and use finite element analysis (FEA) to simulate the hydrogen diffusion in lattice, grain, boundary grain and dislocation in different thermal loads, aiming to understand the intricate mechanisms underlying hydrogen diffusion in nickel-based alloys, which will contribute to driving progress in the field of hydrogen diffusion for understanding...
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Three-Dimensional Path-Following with Articulated 6DoF Robot and ToF Sensors
PublikacjaThis paper presents an algorithm for 3D path-following using an articulated 6-Degree-of-Freedom (DoF) robot as well as experimental verification of the proposed approach. This research extends the classic line-following concept, typically applied in 2D spaces, into a 3D space. This is achieved by equipping a standard industrial robot with a path detection tool featuring six low-cost Time-of-Flight (ToF) sensors. The primary objective...
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Uncovering the electrochemical processes and understanding the causes of the degradation via EIS-DRT in large-scale solid oxide fuel cell
PublikacjaInducing changes in performance and observation of electrochemical processes is quite easy to do using ‘button cells’, which are the favorite objects in most research studies. Unfortunately, those cells may sometimes provide misleading outcomes or lead to promising results, applicable only on small scale, belittling their technological value. In this study, a large-scale SOFC with a 100 cm2 cathode active surface area was subjected...
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Warunki kinematyczne obróbki powierzchni płaskich i walcowych na docierarkach tarczowych
PublikacjaPrzedstawiono kinematykę docierania elementów maszynowych na docierarkach tarczowych. Analizowano docieranie powierzchni płaskich, płasko-równoległych i walcowych. Analizowano wpływ położenia przedmiotu docieranego w separatorze na zmienność prędkości docierania. Przedstawiono wpływ prędkości obrotowej tarczy docierającej na wartość prędkości docierania oraz analizowano prędkość średnią w czasie cyklu ruchu w układzie wykonawczym...
Rok 2024
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A Comparative Study of Precision Surface Grinding Using Additively Fabricated Acrylonitrile–Butadiene–Styrene (ABS) Wheels with Continuous and Serrated Working Surfaces
PublikacjaNowadays, high requirements imposed by mechanical components make it necessary to develop modern production methods. Additive technologies have been dynamically developing in recent years, showing many advantages associated with the fabrication of elements with complex ge-ometries and structures. One of the areas where the potential of additive technologies is exploited is the rapid tooling sector, which is based on the rapid production...
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A Comprehensive Review: Applications of the Kozeny–Carman Model in Engineering with Permeability Dynamics
PublikacjaIn this review article, we investigate the dynamic nature of the Kozeny–Carman Model concerning permeability and its application in engineering contexts. Providing insights into the changing dynamics of permeability within mining, petroleum, and geotechnical engineering, among other engineering applications. While some are complex and require additional modifcations to be applicable, others are simple and still function in specifc...
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A Concept of Thermal Effort for Heat-Induced Metal Plasticity
PublikacjaThis paper proposes a new concept of material effort that considers heat-induced plasticity for heat-resistant steels. These steels indicate a strength differential effect, a stress shearness effect, pressure sensitivity, and other features. Therefore, a three-parameter, temperature-dependent yield function was presented and, next, analytically and geometrically researched. To validate the accuracy of the formulated yield function,...
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A dissimilar welded joint of grade 92 steel and AISI 304L steel obtained using IN82 buttering and IN617 fller: relationship of microstructure and mechanical properties
PublikacjaUnfavourable operating conditions of equipment in the energy industry resulting from high-temperature loads determine the need to use special materials and technological solutions, including welding procedures. In this article, buttering using IN82 (ERNiCr-3) consumables was proposed as a method to improve the weldability of grade 92 steel joined by the gas tungsten arc welding (GTAW) process with AISI 304L (IN617 fller). The...
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A framework for risk matrix design: A case of MASS navigation risk
PublikacjaRisk matrix, a tool for visualizing risk assessment results, is essential to facilitate the risk communication and risk management in risk-based decision-making processes related to new and unexplored socio-technical systems. The use of an appropriate risk matrix is discussed in the literature, but it is overlooked for emerging technologies such as Maritime Autonomous Surface Ships (MASS). In this study, a comprehensive framework...
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A framework to analyse the probability of accidental hull girder failure considering advanced corrosion degradation for risk-based ship design
PublikacjaShip’s hull girder failure could result from maritime accident that can cause human life loss, environmental disaster, and major economic impacts. In risk-based ship design paradigm, accounting for rare phenomena (e.g. ship-ship collision or grounding) is important to provide safe and durable structure. In-service corrosion-induced hull degradation should be considered at the design stage, as it can significantly affect structural...
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A Machine Learning Approach for Estimating Overtime Allocation in Software Development Projects
PublikacjaOvertime planning in software projects has traditionally been approached with search-based multi-objective optimization algorithms. However, the explicit solutions produced by these algorithms often lack applicability and acceptance in the software industry due to their disregard for project managers' intuitive knowledge. This study presents a machine learning model that learns the preferred overtime allocation patterns from solutions...
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A method to synthesise groove cam Geneva mechanisms with increased dwell period
PublikacjaThe present study develops a method to synthesise the groove cam Geneva mechanism with increased dwell period. The main condition of the synthesis is to provide the desired law of motion of the wheel. Additional synthesis conditions are the limitation of the maximum pressure angle and the limitation of the minimum curvature radius of the cam profile. Unlike the conventional Geneva mechanisms, the synthesised groove cam Geneva mechanisms...
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A methodology for ultimate strength assessment of ship hull girder accounting for enhanced corrosion degradation modelling
PublikacjaThe presented work shows a methodology for the ultimate strength assessment of a ship hull, considering enhanced corrosion modelling. The approach is based on the classical Smith method. However, the recent findings regarding the impact of corrosion degradation on ultimate strength are incorporated. To this end, the stress–strain relationships for particular elements composing ship hull cross-section are modified using a specially...
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A model for agribusiness supply chain risk management using fuzzy logic. Case study: Grain route from Ukraine to Poland
PublikacjaIn order to establish new logistics routes, it is necessary to address several technical and organizational issues, among others. One of the most important criteria for evaluating the performance of a supply chain is the delivery time, proactive consideration of potential hazards and associated uncertainties that may occur along the route. However, the existing solutions are often passive and reactive, based on statistics, thus...
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A Model Modification for a Microturbine Set with Partial Admission Stages
PublikacjaThe vapour microturbine set’s mathematical model has been updated to consider the partial admission of turbine stages. Experimental data from two distinct microturbine sets were used to verify the model. The model of the microturbine set was tested under varying operating conditions. Examples of a comparison between the experimental results and simulations are presented and analysed. It has been shown that, when simulating the...